Fig. 1
From: Evolutionary divergence in tail regeneration between Xenopus laevis and Xenopus tropicalis
X. tropicalis but not X. laevis tadpoles at stage 46 can regenerate its tail after amputation. a–h X. laevis tail at 0–7 days, respecitvely, after amputation at stage 46. The tail did not regenerate, and the cut surface became covered with a thick skin-like epithelium (white arrows). i–p X. tropicalis tail at 0–7 days, respectively, after amputation at stage 46. Note that significant tail regeneration occurred by 2 days (k). Scale bar is 0.86 mm. The red dashed line indicates the amputation plane